On Sun, Jan 11, 2015 at 9:33 AM, David Long <dave.l...@linaro.org> wrote:
> From: "David A. Long" <dave.l...@linaro.org>
>
> Certain instructions are hard to execute correctly out-of-line (as in
> kprobes). Test functions are added to insn.[hc] to identify these. The
> instructions include any that use PC-relative addressing, change the PC,
> or change interrupt masking. For efficiency and simplicity test
> functions are also added for small collections of related instructions.
>
> Signed-off-by: David A. Long <dave.l...@linaro.org>
> ---
> arch/arm64/include/asm/insn.h | 21 +++++++++++++++++++--
> arch/arm64/kernel/insn.c | 18 ++++++++++++++++++
> 2 files changed, 37 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h
> index e2ff32a..466afd4 100644
> --- a/arch/arm64/include/asm/insn.h
> +++ b/arch/arm64/include/asm/insn.h
> @@ -223,8 +223,13 @@ static __always_inline bool aarch64_insn_is_##abbr(u32
> code) \
> static __always_inline u32 aarch64_insn_get_##abbr##_value(void) \
> { return (val); }
>
> +__AARCH64_INSN_FUNCS(adr, 0x9F000000, 0x10000000)
Should n't it be
__AARCH64_INSN_FUNCS(adr_adrp, 0x1F000000, 0x10000000)
So, that it also take care about adrp
> +__AARCH64_INSN_FUNCS(prfm_lit, 0xFF000000, 0xD8000000)
[...]
>
> +bool aarch64_insn_uses_literal(u32 insn)
> +{
> + /* ldr/ldrsw (literal), prfm */
> +
> + return aarch64_insn_is_ldr_lit(insn) ||
> + aarch64_insn_is_ldrsw_lit(insn) ||
also aarch64_insn_is_adr_adrp(insn) ||
> + aarch64_insn_is_prfm_lit(insn);
> +}
> +
> +bool aarch64_insn_is_branch(u32 insn)
> +{
> + /* b, bl, cb*, tb*, b.cond, br, blr */
> +
> + return aarch64_insn_is_b_bl_cb_tb(insn) ||
> + aarch64_insn_is_br_blr(insn) ||
also aarch64_insn_is_ret(insn) ||
> + aarch64_insn_is_bcond(insn);
> +}
> +
> /*
--
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